Microbiology: An Evolving Science (Fourth Edition)
4th Edition
ISBN: 9780393615098
Author: John W. Foster, Joan L. Slonczewski
Publisher: W. W. Norton & Company
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Chapter 20, Problem 4TQ
Summary Introduction
To review:
The genome size of eukaryotic
Introduction:
Genome size is the total sum of the deoxyribonucleic acid (DNA) that is found within a single copy of an entire genome. Pictogram is the most often used unit followed by Dalton in order to measure the genome size. It can also be measured as the overall number of
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Which of the following describe prokaryotes?
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Chapter 20 Solutions
Microbiology: An Evolving Science (Fourth Edition)
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- Some prokaryotes, especially archaea, are capable of living in extreme environments, such as deep-sea vents, where temperatures can reach 80°C (176°F). Few organisms can survive at this temperature. What adaptations might archaea possess that allow them to survive in such extreme heat?arrow_forwardWhat is one argument against the idea that the nucleus has also become part of a eukaryotic cell via an endosymbiosis event?arrow_forwardA) A major difference between eukaryotic cells and prokaryotic cells is that eukaryotic cells Group of answer choices exhibit little if any compartmentalization of function are generally smaller than prokaryotic cells have a large degree of internal organization lack organelles have little if any internal organization B) Which of the following statements about protists is false? Group of answer choices Some protists are mixotrophic Certain protists share a common ancestor with land plants Some protists are photosynthetic prokaryotes which are similar to the ancestral chloroplast Protists are a polyphyletic group of organisms that often bear little resemblance to each other Although most protists are unicellular, some protists are multicellular as wellarrow_forward
- In the early 1930s, G. F. Gause carried out a series of experiments using two species of ciliated protists (Paramecium), which are single-celled eukaryotic protozoans. The protists were cultured together and separately, with the bacteria being the single food source. The results are shown in the figure below. (a) Based on figure, identify and explain the interaction that is taking place between P. caudatum and P. aurelia. (b) Clam shrimp, a natural predator to P. caudatum, is introduced to the culture containing both P. caudatum and P. aurelia after 24 days. Predict the impact that the clam shrimp will have on the culture and the populations. Justify your prediction.arrow_forwardWhat are two ways that some prokaryotes are able to survive in extreme environments?arrow_forwardWhich of the following is considered a distinguishing characteristic of prokaryotic cells?Question 6 options: a) They generally reproduce by binary fission. b) They possess a nucleus. c) They generally possess linear chromosomes. d) All of the above are true regarding most prokaryotes. e) None of the above are true.arrow_forward
- Name 4 structures unique to prokaryotic cells. Give the function/adaptation of each.arrow_forwardWhich of these is an example of inductive reasoning? A) Hundreds of individuals of a species have been observed and all are photosynthetic; therefore, the species is photosynthetic. B) These organisms live in sunny regions. Therefore, they are using photosynthesis. C) If protists are all single-celled, then they are incapable of aggregating. D) If two species are members of the same genus, they are more alike than each of them could be to a different genus.arrow_forward(if anyone please help me with all these questions) 2. As eukaryotic cells become more specialized, the nucleus is NOT important as the site of a) DNA synthesis, b) changes in the regulation of genes, c) protein synthesis, d) the transcription of mRNA for protein synthesis, e) DNA mutation. 3. In the evolution of the eukaryotic cell, these cells have key changes that include which of the following: a) These cells reproduce by copying their DNA perfectly each generation. b) They have their DNA in the nucleoid area. c) have adapted the mesosome membrane system of the prokaryote to form a nucleus and an endoplasmic reticulum. d) each new type on new eukaryote cell has its own mesosomes e) none of these are true. 4. The evolution/development of the skeletal system found in the Deuterostomes, is made up of two molecules, Ca+2PO4-2 and collagen These molecules are produced released from by a specialized type of stem cell. Therefore, one would expect that these stem cells perform which…arrow_forward
- 50) Some protists, formerly united as the ʺamitochondriateʺ clade, have recently been shown to be rather diverse. Some of them possess neither mitochondria nor mitochondrial genes (and have been classified as fungi). Others possess no mitochondria, but do have mitochondrial genes in their nuclear genome. Still others have modified mitochondria (viz. mitosomes or hydrogenosomes). Which statement(s) represent(s) consequences of these recent findings? 1. The amitochondriates do not comprise a true clade. 2. The ʺamitochondriate hypothesisʺ concerning the root of the eukaryotic tree has been strengthened. 3. Just as there is a diversity of cyanobacterial descendants among eukaryotes, so too is there a diversity of alpha-proteobacterial descendants among the eukaryotes. 4. If the amitochondriate organisms continued to be recognized as a taxon, this taxon would be polyphyletic. 5. Horizontal gene transfer involving mitochondrial genes has occurred in some amitochondriate organisms. A) 1 only…arrow_forwardIn what ways are prokaryotes key to the survival of many species?arrow_forwardList two features that distinguish prokaryotes from eukaryotes.arrow_forward
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Prokaryotic vs. Eukaryotic Cells (Updated); Author: Amoeba Sisters;https://www.youtube.com/watch?v=Pxujitlv8wc;License: Standard youtube license